This dataset includes results of double blind field experiments and experimental auctions conducted with cowpea farmers in Ghana to gauge the relative demand for three types of seed products--i.e., certified, quality declared, and recycled seed. Files include data on: a) farmer rating of the three seed quality types planted in the farmer managed field demonstration plots; b) farmer’s bid on these three seed quality types during the seed auction experiments conducted on the second field day before harvest; and c) farmer survey data.